Abstract:
:Mutations in the known predisposing breast cancer genes BRCA1 and BRCA2 account for only a small proportion (<10%) of breast cancer families in the Stockholm region of Sweden. This study aims to identify novel predisposing genes in non-BRCA1/BRCA2 breast cancer families. We have employed comparative genomic hybridization (CGH) and loss of heterozygosity (LOH) data in combination with data from a recently carried out genome wide linkage scan, in an effort to identify chromosomal regions harboring potential breast cancer genes. CGH revealed loss of chromosome 17 and chromosome 6q to be a frequent event in high-risk breast cancer families, while gain of 8q was most prevalent in low-risk families. The loss of chromosome 17 was consistent with previous LOH studies and so this region was investigated further. Disease was shown to be linked to chromosome 17 in those families exhibiting loss of the chromosome in both CGH and LOH analyses. An overlapping region of linkage was determined to lie between markers D17S1294 and D17S1293, fine mapping of the region delineated a region between markers D17S1880 and D17S1293. Ten genes were determined to lie within this 1.5 Mb region and families were screened for germline mutations in these genes. In conclusion, we have investigated one possible small region on chromosome 17 for its involvement in high-risk non-BRCA1/BRCA2 breast cancer families. No predisposing mutations were identified in the 10 genes investigated in this study, however further analysis of chromosome 17 is warranted.
journal_name
Int J Mol Medjournal_title
International journal of molecular medicineauthors
Maguire P,Holmberg K,Kost-Alimova M,Imreh S,Skoog L,Lindblom Asubject
Has Abstractpub_date
2005-07-01 00:00:00pages
135-41issue
1eissn
1107-3756issn
1791-244Xjournal_volume
16pub_type
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